[Cython] Cython syntax to pre-allocate lists for performance

Nikita Nemkin nikita at nemkin.ru
Thu Mar 7 13:02:17 CET 2013

Sorry, accidental early send. Previous mail continued...

[None] * N makes an extra pass over the list to assign None to each item
(and also incref None n times).
This is useless extra work. The larget the list, the worse it gets.

Best regards,
Nikita Nemkin

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